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How CVE-2025-4977 Works
This vulnerability in Netgear DGND3700 firmware version 1.1.00.15_1.00.15NA allows remote attackers to access sensitive data via /BRS_top.html. The flaw occurs due to improper access controls, exposing internal network details without authentication. Attackers send crafted HTTP requests to the vulnerable endpoint, triggering unintended data leakage. The CVSS 4.0 vector (AV:N/AC:L/PR:N/UI:N) confirms network-based exploitation with low attack complexity. VulDB reports this as a MEDIUM-severity issue (CVSS-B 6.9) due to limited impact on confidentiality (VC:L) without system compromise.
DailyCVE Form
Platform: Netgear DGND3700
Version: 1.1.00.15_1.00.15NA
Vulnerability: Information disclosure
Severity: Medium
Date: 06/12/2025
Prediction: Patch by Q3 2025
What Undercode Say:
Exploitation
1. Curl PoC:
curl -X GET http://[bash]/BRS_top.html -v
2. Python Scanner:
import requests
response = requests.get("http://[bash]/BRS_top.html")
if "internal" in response.text:
print("[+] Vulnerable to CVE-2025-4977")
Mitigation
- Temporary Fix: Block external access to `/BRS_top.html` via .htaccess:
<Files "BRS_top.html"> Require all denied </Files>
2. Log Monitoring: Detect exploitation attempts:
grep "GET /BRS_top.html" /var/log/nginx/access.log
Analysis
- Impact: Exposes router configs, but no RCE.
- Detection: Check firmware version:
cat /etc/version | grep "1.1.00.15"
- Patch Watch: Monitor Netgear’s security advisories for updates.
Network Hardening
iptables -A INPUT -p tcp --dport 80 -m string --string "BRS_top.html" --algo bm -j DROP
References
- VulDB Entry
- Netgear Security Bulletin: `SB2025-4977` (Pending)
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
